The potential at a point is $20 V$ . The work done in bringing a charge of $0.5 C$ from infinity to this point will be -

20 J

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10 J

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15 J

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18 J

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Solution

The correct option is B $10 J$
We know that, work done,
$w = q Δ V$

$\Rightarrow w = q (V_{f} - V_{i})$

$\Rightarrow w = 0.5 (20 - 0)$

$\Rightarrow w = 10 J$

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The potential at a point is $20 V$ . What will be the work done to bring a charge of $0.5 C$ from infinity to this point?

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